Question # 1

The No. of atoms in 1 mole of carbiton is

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6.02 x 1021

6.02 x 1022

6.02 x 1023

6.02 x 1024

The formula of benzene is _________

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C6H6O3

C6H6

C12H22

Nil

The oxidation number of chromium in K₂Cr₂O₇ is:

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+2

+6

+7

+14

During the formation of water from hydrogen and oxygen, which of the following does not occur?

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Hydrogen has oxidized

oxygen has reduced

oxygen gains electrons

hydrogen behaves as oxidizing agent

All metals are solid except

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AI

Mg

Na

Hg

Molarity is the number of moles of solute dissolved in:

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1 kg of solution

100 g of slovent

Idm³ of solvent

I dm³ of solution

Copper extracted from its ore is ____________ % pure.

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98%

99%

96%

Nil

In double covalent bond, every atom provides

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1 electrons

2 electrons

4 electrons

6 electrons

Smoke in air is the example of solution.

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Gas in Gas

Gas in liquid

liquid in Gas

Solid in Gas

All metals are solid at ________________ temperature.

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Room

High

Low

None

Which of the following is less malleable?

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Sodium

Iron

Gold

Sliver

The absolute zero means:

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273.15 °C

-273.15 °C

0 °C

-373.15 °C

The unit of Molarity is :

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Molar

Volume

Both

Nil

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